Pump Seals | McMaster-Carr

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System of Measurement

Shaft Diameter

Seal OD

For Use With

Diluted Salt Solutions

Synthetic Lubricants

Transmission Fluid

Acetic Acid (White Vinegar)

Ammonium Hydroxide

Seal ID

Manufacturer/Brand Equivalent

John Crane Type 1

John Crane Type 6

John Crane Type 6A

John Crane Type 8T

John Crane Type 21

Pac-Seal Type 8T

Pac-Seal Type 16

Pac-Seal Type 21

Pac-Seal Type 31

Pac-Seal Type 51

Pac-Seal Type 68

Sealol Type 43 CE Long

Sealol Type 43 CE Short

Sealol Type 43 CU Short

Seat Material

Silicon Carbide

Diaphragm Material

Fluoroelastomer

Viton® Fluoroelastomer

Maximum Temperature

Less than 250° F

250° F to 399° F

400° F to 499° F

500° F to 749° F

750° F or greater

Gasket Material

Manufacturer Equivalent Number

Spring Shape

Maximum Pressure

Less than 500 psi

500 psi to 999 psi

1,000 psi to 1,999 psi

2,000 psi to 3,999 psi

4,000 psi or greater

Seat Width

Washer Material

Silicon Carbide

Spring Material

Stainless Steel

For Shaft Motion

Case Material

Stainless Steel

For Sealing

REACH

RoHS

Export Control Classification Number (ECCN)

DFARS Specialty Metals

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529 Products

Shaft Seals

Mechanical Pump Shaft Seals with Extended Spring

Mechanical Pump Shaft Seals with Extended Spring

An extended spring accommodates variations in seal cavity length

Mechanical Pump Shaft Seals

Mechanical Pump Shaft Seals

Commonly used in well, sump, and displacement pumps

Spring-Loaded Rotary Shaft Seals

Spring-Loaded Rotary Shaft Seals

A spring secures the lip against the shaft to prevent messy leaks

Mechanical Pump Shaft Seals with Compact Spring

Mechanical Pump Shaft Seals with Compact Spring

Built with short springs for small circulation and dispensing pumps

Narrow-Profile Mechanical Pump Shaft Seals with Extended Spring

A smaller seal OD than standard seals

Heavy Duty Mechanical Pump Shaft Seals

Heavy Duty Mechanical Pump Shaft Seals

Multiple springs maintain the seal in agricultural, chemical, and mining pumps

Cartridge Mechanical Shaft Seals

Cartridge Mechanical Shaft Seals

The seal and seat are already assembled for fast installation

Other Products

Packing Seals

Fill in gaps around pump shafts, valve stems, and agitators to prevent leaks

Rubber

Compresses and bounces back to shape; often used for sealing, cushioning, and shock absorbing

Packing Seal Lubricating Rings

Packing Seal Lubricating Rings

Install between layers of packing seals to distribute lubricants evenly; also known as lantern rings

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)